checkpatch: add warning for avoiding .L prefix symbols in assembly files

objtool requires that all code must be contained in an ELF symbol.  Symbol
names that have a '.L' prefix do not emit symbol table entries, as they
have special meaning for the assembler.

'.L' prefixed symbols can be used within a code region, but should be
avoided for denoting a range of code via 'SYM_*_START/END' annotations.

Add a new check to emit a warning on finding the usage of '.L' symbols for
'.S' files, if it denotes range of code via SYM_*_START/END annotation
pair.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lore.kernel.org/lkml/[email protected]
Signed-off-by: Aditya Srivastava <[email protected]>
Suggested-by: Mark Brown <[email protected]>
Acked-by: Joe Perches <[email protected]>
Acked-by: Nick Desaulniers <[email protected]>
Cc: Aditya Srivastava <[email protected]>
Cc: Lukas Bulwahn <[email protected]>
Cc: Dwaipayan Ray <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions